bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/MultiInputPropertyViewpointFactory.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.browsing.ui.graph.impl;
  13
  14 import java.util.ArrayList;
  15 import java.util.Collection;
  16
  17 import org.simantics.browsing.ui.BuiltinKeys;
  18 import org.simantics.browsing.ui.NodeContext;
  19 import org.simantics.browsing.ui.PrimitiveQueryUpdater;
  20 import org.simantics.browsing.ui.BuiltinKeys.ViewpointKey;
  21 import org.simantics.browsing.ui.common.NodeContextBuilder;
  22 import org.simantics.browsing.ui.content.Viewpoint;
  23 import org.simantics.browsing.ui.content.ViewpointFactory;
  24 import org.simantics.db.ReadGraph;
  25 import org.simantics.db.Resource;
  26 import org.simantics.db.Statement;
  27 import org.simantics.db.exception.DatabaseException;
  28 import org.simantics.layer0.Layer0;
  29
  30 /**
  31  * A first test version of a viewpoint that provides editing of the shared
  32  * properties of multiple input resources.
  33  */
  34 public class MultiInputPropertyViewpointFactory implements ViewpointFactory {
  35
  36     @Override
  37     public Viewpoint create(PrimitiveQueryUpdater provider, final NodeContext context, ViewpointKey key) {
  38
  39         assert(provider != null);
  40         assert(context != null);
  41
  42         return new LazyViewpoint(provider, context, key) {
  43
  44             @Override
  45             public NodeContext[] children(ReadGraph graph) throws DatabaseException {
  46                 Resource[] rs = (Resource[]) context.getConstant(BuiltinKeys.INPUT);
  47                 if(rs.length == 0) return new NodeContext[0];
  48                 if(rs.length == 1) return new NodeContext[0];
  49                 Resource r = rs[0];
  50                 Layer0 l0 = Layer0.getInstance(graph);
  51                 Resource type = graph.getSingleType(r, l0.Entity);
  52                 for(int i=1;i<rs.length;i++) {
  53                     Resource type2 = graph.getSingleType(rs[i], l0.Entity);
  54                     if(!type.equals(type2)) return new NodeContext[0];
  55                 }
  56
  57                 Collection<Statement> children = graph.getStatements(r, l0.HasProperty);
  58
  59                 ArrayList<NodeContext> resultContexts = new ArrayList<NodeContext>();
  60
  61                 for(Statement child : children) {
  62
  63                     ArrayList<Resource> objects = new ArrayList<Resource>();
  64
  65                     objects.add(child.getObject());
  66
  67                     boolean ok = true;
  68                     for(int i=1;i<rs.length;i++) {
  69                         Collection<Resource> objects2 = graph.getObjects(rs[1], child.getPredicate());
  70                         if(objects2.size() != 1) {
  71                             ok = false;
  72                             break;
  73                         }
  74                         objects.add(objects2.iterator().next());
  75                     }
  76                     if(ok) {
  77                         resultContexts.add(NodeContextBuilder.buildWithInput(new PropertyArray(child.getPredicate(), objects)));
  78                     }
  79
  80                 }
  81
  82                 return resultContexts.toArray(new NodeContext[resultContexts.size()]);
  83             }
  84
  85             @Override
  86             public Boolean hasChildren(ReadGraph graph) throws DatabaseException {
  87                 return Boolean.valueOf(children(graph).length > 0);
  88             }
  89         };
  90     }
  91
  92     @Override
  93     public String toString() {
  94         return "Properties";
  95     }
  96
  97 }